Re: New update KB3024777 fix (after Check for updates about 1 hr ago) - - Since I am administrator on home PC & don't use Defender, I have not seen problem mentioned in other thread.
However, I just installed it & so far it has corrected my onscreen key board issue (re: osk.exe error - "a referral was returned from the server), as well as a 2nd problem trying to access any admin tools (same error message) after trying unsuccessfully to delete KB30004394 from the 12/10 set of updates.
[This had been frustrating as I was not able to access the last restore point earlier due to the inability to execute key Win 32 files from windows/system32/ ...]